Evaporative cooling unit



Sept 4, 1945- J. H. DISHNER EVAPORATIVE COOLING UNIT Filed June 17, 1944 Patented 4.1945

assura Evsroas'rrvE COOLING UNIT y .mm n. nahm, mnu, Tex. applicati@ June 11, 1944, sensi Nc. Masas i claim. (ci. zal-ss) 'I'his invention relates to air conditioning machines and equipment and it has particular reference to evaporative cooling units.

The principal obiect of the invention is to provide an air washing and cooling unit of the evaporative type, using as a capillary medium, common sponges suspended in a water reservoir.

However, chief among the important characteristics of the invention is a novel form of cabinet whose peculiar construction produces a Venturi edect at the inlet, restricting the inilowing air to the exposed, moistened areas of the sponges and. although there is a modifying effect on the velocity of discharge, more complete evaporation obtains which consequently produces a more satisfactory cooling eilect without the discomfort of a high velocity air stream.

Another object of the invention is to provide a cabinet constructed as set forth, whose interior wall surfaces are covered or coated with a substance known to possess sound insulating qualities and which minimizes vibration and noises originating within the cabinet.

Another object ofthe invention is to provide a cabinet of pleasing external appearance and a unit as a whole which is inexpensive, economical to operate and requires little attention in operation and maintenance.

With the foregoing objects as paramount, the invention has further reference to certain foatures of accomplishment which will become apparent as the description proceeds, taken in connection with the accompanying drawing wherein:

Figure l is a perspective view of an evaporative cooling unit constructed according to the present invention.

Figure 2 is a vertical sectional view along the longitudinal axis of the cabinet.

Figure. 3 is a detail perspective view of a rack for supporting the Sponges or other capillary medlum.

Figure 4 is a front elevational view of the fan motor and mounting, per se, and

Figure 5 is a fragmentary detail view of the louvered rear portion of the cabinet.

Continuing with a more detailed description of the, drawing, reference is primarily made to Figure 1 in which numeral III denotes a cabinet which, although shown as being mounted upon a caster supported pedestal Il, may obviously be mounted in any manner most suited tothe conditions under which it isintended to operate. The pedestal affords a convenient mounting inin relation to windows where it is desired to dispose the unitso that outside airwillbe drawn into a room. Moreoventhe pedestal is provided with a pair of relatively spaced knobs I2, about which is wound the service cord i3 to the fan motor during inoperative periods of the machine or when a surplus length thereof is to be placed out of the way,

The particular design of the cabinet il is the eilective medium byv which is brought about the results desired. Primarily, the front of the cabinet is square or rectangular and has an air discharge` opening I4 therein. A rim or ring Il of plastic or other vsuitable material embraces the edge of this opening and serves as an anchorage for the ends of a plurality of relatively spaced and parallel rods It which overlie the opening and serve as a guard for thesfan Il disposed immediately behind the opening.

'Ihe cabinet is so designed that the forepart is of greater cubic content than the rear portion thereof which latter is denned by the sloping formation of the top of the cabinet I.from a point spaced from the front thereof to the back of the cabinet. The degree of inclination of the cabinet top is modified at a point approximately midway between the high and low points and a cover Il. having louvers I! is hinged at 2B along the break in the inclined plane of the top. The hinged cover Il is turned downwardly at the rear and is provided with spring latches Il, interlockable with projections 22, mounted on the extended end of the bese 23 of the cabinet. A handle 24 is afforded for raising and lowering the cover il. f

It will be particularly noted especially in Figure 2 that the angular positions of the louvers I9 are such as to direct air drawn therethrough towards the center of the rear compartment of the cabinet, in which is disposed a receptacle 2i, containing water. To further insure that the air thus entering the cabinet is constrainedto move across the surface ofthe water in the receptacle 2l, a, curved baule 26 is amxed along one edge to the undersurface of the cover It in the vicinity of the hinge thereof and extends entirely across the compartment. As the air impinges this baille it is forced downwardly towards the surface of the water and is drawn underthebame!! initscoursethroughthecabinet. In this manner more intimate contact with moisture laden Sponges 21 is effected, hence more satisfactory cooling of the air is brought about without undue entrainment of moisture.

asmuchasit canbequicklyand easilymoved Thespongesllaresuspendedbymeansofa wire frame ze, shown in detail in Figure s aria portions thereof are permitted to extend'above the level of water in the receptacle 25. The frame 2l is removable from the receptacle 25 and the latter, in turn, is removable from the cabinet Il :for replenishing the water supply or for replacing or cleaning the sponges 21 of foreign' It is evident from the foregoing that duringy operative periods of the motor il, irrespective of the speed thereof, air constrained thereby toenter the cabinet I0 through the louvered cover Il will do so at high velocity by virtue of the Venturi eil'ect created by the reduced rear portion of the cabinet, but will emerge at the front thereof with considerably less velocity. This is highly desirable in an air cooling unit of the evaporator type and the comparatively large discharge opening permits the pre-cooled air discharged from thacabinet to expand in the room or enclosure in which the machine is operating at a moderate rate to avoid too rapid increase in temperature as would be the case if discharged at high velocity. Moreover, restrictions at the intake compelling the air towards the water and into close contact with the absorptive elements 21, result in the removal from the air entrained dust particles and foreign matter before it is expelled into the room. v

Manifestly, the construction as shown and described is capable of some modification and such modification as may be construed to fall within the scope and meaning of the appended claim is also considered to be within the spirit and intent oi' the invention.

0 What is claimed is:

In an evaporative cooling unit, the combination comprising an interiorly insulated and portable cabinet having a top portion provided with a downwardly and rearwardly sloping area originating at a point spaced from the front thereof, a fan in the front portion of said cabinet, a

hinged cover for the rear portion of said cabinet Y having parallel slots defined by deectors arranged at a` variety of relative angles for directing separate streams of air towards the center of said rear portion, a grilled opening in the front of said cabinet, a, liquid reservoir removably disposed in said rear portion, capillary means in said reservoir for elevating water into the influence of air passing through said parallel slots and a curved baille for constraining air entering through said slots to flow in intimate contact with saidcapillary means in its course through said cabinet.

JOHN H. DISHNER. 

